Improved well-borer



UNITED STATES PATENT GFFICE) JOHN T. PARKER, OF FARMINGTON, MAINE.

IMPROVED WELL-BORER.

Spceilication forming part of Letters Patent N0. 55,672, (lated October9, 1856.

To all whom it may concern:

Be itknown that 1, JOHN T. PARKER, of Farmington, Franklin county, Stateof Maine, have invented a new and Improved Self-Ei@ panding Auger forBoring Artesian Wells; and I do hereby declare that the following is afull, clear, and exact description thereof, which will enable othersskilled in the art to make and use the saine, reference being had to theaccompanying drawings, t'orming part oil this specitication, in which-Figure l is a front view of my improved expanding anger, and Fig. 2 is abottom view of the same.

Similar letters ot' reference in the different figures indicateeorrespondin g parts.

This invention relates to that class of anger in which the tubing ofthewell is made to foilow immediately in the rear ofthe auger, and, owingto its expanding and contracting construction, the anger may be removedat pleasnre through the bore of the tubing, and it consists in apod-anger divided into two parts, and hinged together in such a mannerthat when boring the auger is expanded `by the resistance ot' thematerial which is heilig bored or acted npon, as hereinafter explained.

This anger in general form is much like an ordinary pod auger; but thebody of the auger is divided into two parts, A B, Fig. 1, and these twoparts are hinged together by a hinge or pivot, c, and are alsoeonnected'together by a stop-pin, c, which projects from the part A, andworks in a slot, d, in the other portion, B,

vso that the lower portions ot' the two parts A and B may spread apartor expand more or less, as determined by the length of theV slot d, andthen the pin e acts as a stop to prevent further expansion of the auger.b is the cut` ting-lip, and a is the gage-lip, which prevents thecutting-lip b from takin g too rank a hold or bite. A shows the tubing'following immediately in the rear ofthe auger. A is the driving-shank ofthe auger. Y

Its operation is as follows: The anger when contracted drops downreadily through the bore of the pipe or tubing D; but when it strikesthe ground and boring is commenced, then the cutting-lip b takes hold,and the resistance of the substance being eut presses b outward, so thatthe anger is expanded until stopped by the pin or stop c, and the augerin this position makes a cut, the diameter of which is equal to theoutside diameter of the.

tubing D, and as the boring progresses the said tubing D is made tofollow in the rear of the anger A B. Then the auger is to be withdrawnthrough the tubing I) it contracts readily as soon as its cutting-edge bis raised clear of the bottom ot' the bore, so that the cutting-lip letsgo its hold; or the auger may be Contracted by reversing.

By these means I produce an expanding auger which is efticient inaction, and which is extremely simple in its construction.

Having thus described the nature of my invention, what I claim as new,and desire to secure by Letters Patent, is-

The combination ofthe slotted part B, part A, stop-pin c, and hinge c,operating substantially as described, tor the purpose specified.

JOHN T. PARKER.

Vitnesses:

C. A. ALLEN, E. SPRAGUE SWIFT.

